Note 10 - Borrowed Funds (Details) - Callable Securities Sold Under Agreements to Repurchase (Callable [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Note 10 - Borrowed Funds (Details) - Callable Securities Sold Under Agreements to Repurchase [Line Items]
No. of agreements	5
Amount (in Dollars)	$ 250,000
Weighted average rate	4.70%
Callable Securities [Member] | Fixed to Floating Fifty Million With One Agreement at Three Point Five Percent [Member]
Note 10 - Borrowed Funds (Details) - Callable Securities Sold Under Agreements to Repurchase [Line Items]
Maximum rate	3.50%
Minimum rate	0.00%
No. of agreements	1
Amount (in Dollars)	50,000
Weighted average rate	3.50%
Final maturity	2015
Callable Securities [Member] | Floating to Fixed Rate Agreements Totaling $200 Million [Member]
Note 10 - Borrowed Funds (Details) - Callable Securities Sold Under Agreements to Repurchase [Line Items]
No. of agreements	4
Amount (in Dollars)	$ 200,000
Weighted average rate	5.00%
Final maturity	2017